rpc_localaddr(9)

🎀 rpc_localaddr(9) — Kernel API Manual, but make it bestie-friendly 🎀

okay so bestie, this is the Kernel API Manual page for rpc_localaddr(9), and it’s literally about discovering the local endpoint address for an RPC client. no cap. 💅

🌈 NAME 🌈

rpc_localaddr — discover local endpoint address for an RPC client.

✨ SYNOPSIS ✨

int rpc_localaddr (struct rpc_clnt *clnt , struct sockaddr *buf , size_t
       buflen );

🌸 ARGUMENTS 🌸

• clnt — RPC client structure
• buf — target buffer
• buflen — size of target buffer, in bytes

💖 DESCRIPTION 💖

If it slays, this function returns zero and fills in buf and buflen; otherwise, a negative errno is returned. that’s the whole mood. ✨

This works even if the underlying transport is not currently connected, or if the upper layer never previously provided a source address. yes bestie, it still pulls it off. 💅

The result of this function call is transient: multiple calls in succession may give different results, depending on how local networking configuration changes over time. so don’t be surprised when the vibe check changes between calls, fr fr. 🦋

💅 SEE ALSO 💅

Kernel file ./net/sunrpc/clnt.c — plus the whole bestie lineup:

• rpc_create(9)
• rpc_clone_client(9)
• rpc_clone_client_set_auth(9)
• rpc_switch_client_transport(9)
• rpc_clnt_iterate_for_each_xprt(9)
• rpc_cancel_tasks(9)
• rpc_hold_client(9)
• rpc_release_client(9)
• rpc_bind_new_program(9)
• rpc_run_task(9)
• rpc_call_sync(9)
• rpc_call_async(9)
• rpc_run_bc_task(9)
• rpc_prepare_reply_pages(9)
• rpc_peeraddr(9)
• rpc_peeraddr2str(9)
• rpc_net_ns(9)
• rpc_max_payload(9)
• rpc_max_bc_payload(9)
• rpc_force_rebind(9)
• rpc_clnt_test_and_add_xprt(9)
• rpc_clnt_setup_test_and_add_xprt(9)
• rpc_clnt_add_xprt(9)

xoxo, your kernel bestie 🫶 source/version: ./net/sunrpc · date: October 2026 · page: rpc_localaddr(9) 💖✨